AD8156ABCZ

ANALOG DEVICES  AD8156ABCZ  芯片, 数字式交叉开关, 4X4, BGA-49

Product Details

The AD8156, a member of the Xstream line of products, is a high speed, fully differential, digital crosspoint switch. The part can function as a 4 × 4 crosspoint switch with double-latched memory, allowing simultaneous updates, or as a dual 2 × 2 with direct output control. The AD8156 has low power dissipation, typically 700 mW on 3.3 V with all outputs and input equalizers active. It operates at any data rate from dc to 6.25 Gbps per port.

Each input channel on the AD8156 has a programmable input equalizer to compensate for signal loss over a backplane.

The AD8156 high speed inputs are compatible with both ac-coupled and dc-coupled 3.3 V, 2.5 V, or 1.8 V CML, as well as 3.3 V LVPECL data levels. The control interface is LVTTL- and LVCMOS-compatible at 3.3 V. All input and output termination resistors are integrated for ease of layout and to minimize impedance mismatch. Input equalization and unused outputs can be individually disabled to minimize power dissipation.

The AD8156 is packaged in a 49-ball, 8 mm × 8 mm, BGA package with a 1 mm ball pitch. It operates over the industrial temperature range of −40°C to 85°C.

**Applications**

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SONET/SDH

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Gigabit Ethernet

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XAUI

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Fibre Channel

### Features and Benefits

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4 × 4, fully differential, nonblocking array

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Configurable for dual 2 × 2 operation

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DC to 6.25 Gbps per channel, NRZ data rate

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Programmable input equalization compensates for over 40” of FR-4 at 6.25 Gbps

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Multicast and broadcast modes of operation

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Programmable output swing

100 mV p-p to 1.6 V p-p differential

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Power supply: 3.3 V ±10%

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Low power

No EQ: 400 mW typical

Maximum EQ: 700 mW typical

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Inputs: ac-coupled or dc-coupled

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Wide set of dc-coupled input standards

3.3 V/2.5 V/1.8 V CML or 3.3 V LVPECL

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Control: LVTTL- or LVCMOS-compatible

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Low additive jitter: 25 ps p-p typical